There were 13 exposure groups: group 1 was exposed to 900 MHz or 1800 MHz with the antenna in contact with the glass vial containing flies; group 2 was exposed to 900 MHz or 1800 MHz with the antenna of the mobile phone at 1 cm distance from the vial; group 3 was exposed to 900 MHz or 1800 MHz with the antenna of the mobile phone at 10 cm distance from the vial. The fourth group was exposed to 900 MHz or 1800 MHz with the antenna of the mobile phone at 20 cm distance from the vial, ect. (group 12 had a distance of 100 cm). Group 13 was sham exposed. Each group consisted of ten female and ten male newly emerged flies kept in separate vials for the first 48 h. After the 48 h, when both males and females of each group were sexually mature, they were put together (10 pairs) in another glass vial and they were allowed to mate and lay eggs for the next 72 h. For cell death investigation ovarioles were investigated (background information about ovarioles, see Panagopoulos 2007b).
The electromagnetic fieldexposures decreased the reproductive capacity by cell deathinduction at all the different distances tested. The effect diminished with the distance from the antenna (decreasing intensities). An increased bioactivity "window" (window effect) was revealed at distances of 20-30 cm from the mobile phoneantenna, (intensity around 10 µW/cm²) where the effect became highest, in relation to smaller or longer distances. The effect diminished considerably for distances longer than 40-50 cm and became not evident for distances longer than 1 m or intensities smaller than 1 µW/cm².